TaxNo: 6684Genus Masonoceras
| Suborder: |
Tornoceratina
|
| Superfamily: |
Karagandoceratoidea
|
| Family: |
Karagandoceratidae
|
| Genus: | Masonoceras |
| Qualifier: | ge |
| Author: |
Work & Manger 2002,p.574
|
| Lower Boundary: |
low.Tournais.--mid.Tournais. [Tn1--Tn2], 357.5 million years
|
| Upper Boundary: |
G.typicus--anchoralis-latus Z. base [0, 349 million years
|